--- src/process.cpp.orig	Fri Jan 16 07:27:00 2009
+++ src/process.cpp	Sat Mar 24 10:15:59 2012
@@ -526,7 +526,7 @@ void    Process::attach(const char *dev)
 
 void Process::setScheduler(const char *pol)
 {
-#ifdef	_POSIX_PRIORITY_SCHEDULING
+#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
 	struct sched_param p;
 	int policy;
 
@@ -582,7 +582,7 @@ void Process::setScheduler(const char *pol)
 
 void Process::setPriority(int pri)
 {
-#ifdef  _POSIX_PRIORITY_SCHEDULING
+#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
 	struct sched_param p;
 	int policy = sched_getscheduler(0);
 	int min = sched_get_priority_min(policy);
@@ -607,7 +607,7 @@ void Process::setPriority(int pri)
 
 bool Process::isScheduler(void)
 {
-#ifdef  _POSIX_PRIORITY_SCHEDULING
+#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
 	return true;
 #else
 	return false;